Liquid-motor.



A. F., KRAUSE, LIQUID MOTOR. APPLIOATION FILED APR. s. 190e.. 969,378.

f 4,0m A wx Q Patllted Sept 6,1910

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UNTTED STATES PATENT oEEicE.

ALBERT F. KBAUSE, or' BUFFALO, NEW YORK, AssIGNoR oF ONE-HALF ToCHARLES C.

LADD, or BUFFALO, NEW-YORK.

immensen.

Specication of Letters Patent."

Patented Sept. c, 1910.

Original application led March 20, 1905, Serial No. 250,964. Divied and-this application filed April 6,

1908. Serial 210.425,491.

To all whom it may concern:

Be it known that I ALBERT F.KRAUsE, a citizen of the United 'at Buffalo, in the county of Erie and State of New York, have invented a new and useful Im rovement in Li uid-Motors,of which the follbwing is a speci cation.

This invention relates to a portable motor adapted to be o erated b water pressure or other suitable uid, an designed more particularly for rotating the cutter head of a boiler tube cleaner ofthe type employed for removing scale or incrustation from 'the tubes of water-tube boilers, the motor form-` -mg the body of the tool and being pushed through the boiler tube as the cleaning operation progresses.l

This application is a sub-division of m application Serial No.' 250,954, filed Marc Y 2o, 1905.

lThe object of the invention is' the production of a simple and compact motor of this character which has the .necessary powerl to operate the cleaner-head in such manner-as to eii'ectually and expeditiously detach the scale from thewater tubes.

In the accompanying drawings: Figure 1 'is a longitudinal section of the motor in line 1-1,Fig. 2. Figs. 2, 3, 4 and 5 are 'transverse sections ony the co'rrespondingl numbered lines in Fig. 1. Fi 6 is a longltudinal section in line 6 6, ig. 3. Fig'. 7 is a side elevation of the rotary drum omittin lthe pistons. i imilar letters of reference indicate co1"- responding parts throughoutthe several views.

A is the shell or casing of the motor which is preferably c lindrical and suiiiciently* smaller than the' ore of a boiler tube to per init the device to be freely pushed through 1t. The rear head A1 of the casin mayfbe integral with the body and provide with an ',lnlet chamber a for the water or other motive fluid and a rearwardly-extending socket al communicating therewith. and adaptedto receive a Water supply pipe B which is connected with the source of supply bya iiexible'tube or other connection not shown in the drawings. The. front head C of the casing may consist of a screw plug, the reduced innerportion of which engages States, and residingv with the internally screw threaded front end. of the casing, ,thislplug being locked in place by a longitudinal screw c or other suitable means. I I Inthe chamberV D.v between the heads A AandC is journald a rotary' drum or shaft E carrying retractable or pistons F against which the motive uid'acfts for .turning the drum." The drum is concentric with the casing and its journals e,e,1are supported in suitable vbearings arranged axially in the front and reanheads of the casing, and the journal e1. extends forwardly through the front head C and carries a cutter-head, not shown in the drawings, or anyother suitable tool to be rotated. While these' bearings may be of any a proved-construction, they are preferably oitheroller. ty e, as shown.

g indicates the rollers o the rear bearing interposed lengthwise between the adjacent journal e and a' bushing g1 which lines the bearing 4socket or cavity in the rear head A1, the ends of .the rollers being. journaled in suitable retainers g2. front journal 'el has similar longitudinal rollers g3, retainers g4 and a bushing g5 seated in a socket of the front head C. In addition to these bearings the journals e, el may be provided with end lor thrust-bearings of any suitable construction. In the form shown in the drawings, the rear journal is ,provided in its end with a projecting hardened pinfh which bears against a removable screw plug h1 seated axially in the rear head A1, while the front thrust-bearing consists of conical rollers 71,2 journaled in retainers h3 and interposed between corresponding rings h4, h5 which surround rthe 'front 'ournal. The front ring h5 abuts against an internal shoulder of the head C, While the rear ring h4 abuts against a'ringz' secured to' the adand journaled in vcorresponding sockets in the face of the drum E, and at their ends in bearings formed in the opposing sides of the rings'z, il. These rings mayconsist of The bearing of the.`

or wings F4 aire provided with cylindricalknuckles f extending throughout their length they are provided with trunnions f1 seatedjacent end of the drum by a screw or other v struction, each open sure of the motive llquld against 1ts face tends to swing on the outer yedge of the rear wall f2 of the corresponding knuckle-socket as a fulcrum and its knuckle bears aga-mst` the front Wall of said socket, thus largely re- -lieving 'from strain the piston trunnions f1 which are only required for retaining the knuckle in its sockets While the piston is unfolding. The pistons are preferably curved transversely and'fold into pockets or recesses j formed in the 4peripheryof the drum E,

l so that when closed, their backs are Hush with'the drum. The portions of these pockets which receive the free outer portions of the pistons are somewhat deeper than their inner portions, except at thelr ends, so as to leave spaces or channels under the pistons when closed which permit the motive liquid or fluid to' enter between the pistons and the drum and promptly open the same. The shallow end portlons j1 of the pockets (see Fig. 7) form stops which limit the closing movement of the pistons. v l

7c indicates an inlet passage arranged in the casing on one side of the main or piston chamber D and preferably extending from the inlet chamber a.' nearly to the front head C. This longitudinal passage communicates with said main chaulberbyports a rra uged on one side of a, longitudinal abutment M against 'which the piston drum bearsl and w rich extends throughout the length of the latter. v

Z indicates a main exhaust port arranged in the front head C on the opposite side of the abutment M and extending forwardly through the head, as shown in Figs. 5 and (S, and Z1 indicates supplementary exhaust ports arranged in the Wall of the chamber D on the same side of the abutment as the exhaust port Z. The abutment thus separates the inlet side from the outlet or exhaust side of the ehamber'D. vThe drum is considerably smaller in diameter than this chamber to leave` an intervening space across which the .pistons extend when opened by the water c1 and the pistons causes the vlatter to be subjected to the lpressure under which the fluid enters the chamber, thereby rotating the drum at a high speed. Then the'pistons reach the exhaust side of the chamber D,

they are-folded into the pockets y' by contact With the cam N and the abutment M and the spent water is exhausted laterally through the ports Z1 and forwardly through the port Z. By exhausting the water from the motor casing both laterally and forwardly, the boiler tube in which the deviceis inserted, yis constantly flushed during the operation of the tool, washing out the scale as rapidly as it is detached.

In order to supportthe motor clear of a surrounding boller tube and prevent binding 4or blocking of thev same by the detached scale, the casing is provided near its front and rear ends with yielding centering pins or plungers O, preferably threein each set, which are adapted to bear against the tube.

An important feature of the invention is the central location of the piston shaft or drum in the casing concentrically with the latter and the chamber D and the arrangement of the inlet j mssage Z: lengthwise ot the casing on', one side of the drum.. This construction permits the use of a strong and solid piston shaft and at the same time enables the motor to be made sufficiently small and compact to enter boiler tubes of comparatively small diameter. As the movable pistons are arranged lengthwise of the casing and parallel with the shaft, they can be extended longitudinally and correspondingly increased in area without at the same time enlarging the diameter of the motor casing, producing a small-sized motor of relatively great power which is f especially advantageous for rotating at high speed the cutter` head of a boiler tube cleaner of the typeem`v ployed for removing scale from Water tubes. i

The casing is subjected to considerable strain .and by forming the same, its rear head andthe abutment M in-one piece, it is greatly strengthened, the abutmen contributing largely to this resultl by actin-g as a brace. The piston drum is also subjected to great strain in the operation of the tool, and by constructing and arranging the bearings as shown and described they efectually l. A fluid pressure motor for boiler tube.

cleaners, comprising a cylindrical casing, a shaft journaled 1n the casing concentrically therewith and separated therefrom by an 1ntervening piston chamber,- an abutment in said chamber, and movablel pistons carried bg said shaft and 'cooperating with said .a utment, thel casinghaving in its rear end a fluid inlet arranged vsubstantially in line with said' shaft, andan inlet passage connecting said inlet with the piston chamber, said passage being arranged in the side Wall of the Casin lengthwise thereof.

2. A fini -pressure motor for boiler tube cleaners, comprising a cylindrical casing, a shaft journaled in the casing concentrically therewith and separated therefrom by an intervening` piston-chamber, an abutm'ent in said chamber adjacent to the shaft, and mov,- able pistons carried by the shaft, the casing being provided in its rear end with a Huidinlet arranged in line with said shaft and a longitudinal inlet-passage leading from said inlet to the piston-chamber on one sideof. said abutl'neut, the rear end of the shaft ter-A minating shortof said inlet and its front end. extending forwardly beyond the pistonchamber. v

3. A Huid pressure motor for boiler tube cleaners, comprising a cylindrical casing, a

shaft journaled in the casing concentrically therewith and separated therefrom by an-intervening ,piston chamber, an abutment in said chamber adjacent tothe shaft, and movable pistons carried by the shaft, the casing being provided in its -rear end with a iuid inlet and in its side wall with a longitudinal passage leading forwardly from the inlet. said passage communicating with the piston ychamber by atransverse. passage arranged on` one side of said abutment.

4. A fluid'pressure motor for boiler tube cleaners, comprising a cylindrical casing. a shaft j ournaled in the casingvconcentrically therewith and separated'therefrom by an iutervening piston chamber, an abutment in said chamber adjacent to the shaft, and movable pistons ca'rried by the shaft .and arranged parallel therewith, the casing haring in its rear end a fluid inlet arranged in line with said shaft and in its side `v vall a longitudinal passage communicating with said inlet and extending throughout the length of the piston chamber, said longitudinal passage communicating With4 the piston chamber by a transverse passage or passages.

Witness my hand this 31st day of March.

C. F. GEYER, E. M; GRAHAM.V 

